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Finding the Fourth Proportional to 135,388.93, 186,843.60 and 74,966.21

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Solution

The fourth proportional to 135,388.93, 186,843.60 and 74,966.21 is: 103,457.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,388.93 : 186,843.60 = 74,966.21 : x
  2. Step 2: Convert to fraction form
    135,388.93/186,843.60 = 74,966.21/x
  3. Step 3: Cross multiply
    135,388.93x = 186,843.60 × 74,966.21
  4. Step 4: Simplify right side
    135,388.93x = 14,006,956,554.76
  5. Step 5: Solve for x
    x = 14,006,956,554.76/135,388.93
  6. Step 6: Final answer
    x = 103,457.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.